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Nightmare Fuel: Carrie
When you're making a movie based on a Stephen King novel, this stuff kind of goes with the territory.
The scene where prom-goers are electrocuted by broken power cables. We're given a lovely description of Rhonda Simard convulsing from the electricity, before her full skirt burst into flames. While still convulsing. Yikes.
At one point Carrie loses "sight" of the gymnasium doors and some try to escape - only to have Carrie regain focus and slam the doors again - severing one poor guy's fingers off.
Sue is at home during prom. When the town's fire sirens go off, she rushes to the window and sees the high school on fire. Sue gets into her mother's car and drives to the school - only to witness the entire gymnasium wing explode into a massive fire ball.
Later on, a woman, Cora Simard, (who is actually the mother of the aforementioned Rhonda) describes the horrific deaths of the much of the town's populace, many of them having been awoken from their sleep by the disaster unfolding outside. Carrie used her powers to snap the surrounding power lines. The downed lines horrifically electrocute many of those present. Cora then describes the death of her friend, Georgette Shyres, as she runs away from Cora in a panic. Georgette runs straight into a power line and we are treated to a truly squicky description.
"She let go of my hand and started to run for the sidewalk. I screamed at her to stop-there was one of those heavy main cables broken off right in front of us-but she didn't listen. And she . . . she .. . oh, I could smell her when she started to burn. Smoke just seemed to burst out of her clothes and I thought: that's what it must be like when someone gets electrocuted. The smell was sweet, like pork. Have any of you ever smelled that? Sometimes I smell it in my dreams. I stood dead still, watching Georgette Shyres turn black."
Carrie getting her first period considered nightmare fuel to her. This was a girl who's mother never told her about the female biology let alone stuff normal for women, like pre or post menstrual. So when she got her first she initially thought she was bleeding to death. To make matters worse, when her mother does find out about it, rather than do the rational thing and calm her down. She beats her and locks her in the praying closet claiming that she must have sinned, because in her view point she was cursed with the curse of blood.
The 'Prom Night' section of the book features a AP news ticker later on. As time progresses, the news becomes more and more serious...
Chamberlain after Prom Night, especially when people are still finding and burying bodies.
Carrie's life, for the most part, is a total nightmare. Her classmates bully her, her mother punishes her for everything she does, she has no-one to turn to, and in the end her mother tries to kill her.
The 1976 film
The very last scene of the movie, where Carrie's hand reaches up from the ashes to grab Sue, terrified an entire generation of moviegoers, and helped to establish the "final reel Jump Scare" as a horror movie tradition.
Even the immediate aftermath of Carrie being dumped on with pig's blood is full of this. Just the way she momentarily stands there in stunneded silence that gradually gives way to a silent wail of horror and anguish...
"They're all gonna laugh at you! They're all gonna laugh at you!"
After the pig blood, when she goes nuts and kills everyone in the gym and sets the school on fire with her telekinetic powers.
There's that shot of Carrie standing outside the gymnasium, with the screams of people being burned alive in the background. What makes it scary is that she's just standing there, motionless◊, before going on the move again.
The same hymn is also used in the first 1-minute teaser trailer to very unnerving effect, played alongside the crackling of the fires and the witness statements. "They say...they say...they say...they say..."
Margaret reaching for sewing scissors and preparing to stab Carrie, who at this point is a newborn baby.
At several times during the prom sequence and the showdown with Chris and Billy, Carrie can be seen sporting a Slasher Smile between her expressions of rage. Also the fact that it is made abundantly clear that Carrie is in complete control of her powers during the sequences.
Compare this with the 1976 and 2002 versions of the same sequence, which mostly give the impression that Carrie is in shock rather than enraged. Here, you can not only tell she's enraged, but she's clearly on a Power High.
Making this scene much more like its literary counterpart, where the rampage was more or less premeditated.
The mean twins Nikki and Lizzy get trampled to death while Carrie watches in glee.
Yet another unlucky teen during the prom rampage is crushed by folding bleachers.
While trying to escape, Tina is whipped by electric cords and then set on fire.
Chris's death - she's thrown face-first into the windshield, and then her car gets thrown into the nearby gas station. Trying to run over Carrie twice was obviously a VERY BAD IDEA.